Important notice about reduced STEREO
STEREO In-Situ and Radio Space Weather Beacon Data
Shown here are plots of the latest in-situ particle and fields data from the
STEREO IMPACT and PLASTIC instruments, and radio data from SWAVES. The
STEREO space weather beacon telemetry mode is a very low rate, highly
compressed data stream broadcast by the spacecraft 24 hours per day. These
data are used for space weather forecasting. Because the data are produced
in real-time, the calibrations may not match those used for the final data
Update, 24 March 2015: The IMPACT, PLASTIC, and SECCHI instruments
on Ahead were turned off for superior solar conjunction on Friday, 20 March
2015, and the STEREO Ahead spacecraft was reset on Tuesday, 24 March, into
the "safe mode" that it be in until July 2015. Please see
this link for more information.
SWAVES will remain on, storing data on the recorder for eventual playback,
but realtime SWAVES data will no longer be available until side lobe
operations resume in July. Therefore, this latest plots service is suspended
for the duration. Earlier plots are available through the
daily browse pages.
SWAVES radio data
Plot revised: Tuesday, 24-Mar-2015 12:16:18 EDT
This page should automatically update every 5 minutes. Otherwise, use your
browser's "reload" button to get the most recent plot.
Radial-Tangential-Normal (RTN) coordinates are defined such that
the +X axis points from sun center through the satellite (radial), and
the +Z axis points along the projection of the solar North pole (normal).
The +Y axis completes the right-handed coordinate system, and points
towards the solar West limb (tangential).
The data on this page include telemetry collected by the following
We would also like to acknowlege the past assistance from the following
- NASA Deep Space Network
- National Institute of Information and Communications Technology: Koganei,
- Centre National d'Etudes Spatiales: Toulouse, France
- Amateur station DL0SHF, Kiel-Ronne, Germany
- AMSAT-DL/Bochum Observatory, Germany
- Rutherford Appleton Laboratory: Chilbolton, UK
In addition, we wish to acknowlege
- Amateur station KA9Q, Phil Karn, for writing and donating the decoding
software used at the ground stations.
- NOAA Space Weather Prediction Center for organizing and scheduling the
ground station network.
Last Revised: Tuesday, 24-Mar-2015 14:50:44 EDT
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